Remember, Medic had already taken a beating before, and you had a type advantage when you went into the second form, and were using STAB fighting type moves. Plus, most of my pokemon were massive bulky heavy hitter (i.e: Tyranitar eating Melloetta's focus blast for breakfast, even though it was 4x super effective). Medic, being a Blissy, has low almost everything besides health and speed. Focus more on how well it could've done on the Rayquaza per say. Despite having no status booster, I nearly dragon clawed the Snorlax to death. Think of ways to defend against that. Then there's T-Tar's sandstorm to think of.